merged verbose logging change from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9617 a83610d8-ad2a-0410-a6ab-fc0612d85776
make test_transfer much more likely to succeed

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9618 a83610d8-ad2a-0410-a6ab-fc0612d85776
merged m4 script update from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9621 a83610d8-ad2a-0410-a6ab-fc0612d85776
allow valgrind to take even longer

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@9622 a83610d8-ad2a-0410-a6ab-fc0612d85776